JP4944515B2 - Fluid pipe connector structure - Google Patents

Description

  The present invention relates to a fluid pipe connector structure for connecting fluid pipes or a fluid pipe to a storage tank, a processing apparatus, or the like.

  As a fluid pipe connector for connecting a fluid pipe for flowing a chemical solution or the like to a storage tank or a processing apparatus for storing the chemical solution or the like, a flange structure having a flange structure is generally known. For example, the fluid pipe for flowing chemicals uses a triple structure consisting of an inner tube, an intermediate tube, and an outer tube, ensuring a sufficient thickness for the inner tube, etc., and adopting a steel material such as a stainless steel tube for the outer tube. Safety measures such as leakage prevention are taken. For this reason, a fluid pipe becomes a considerable weight, and the force of the direction which opens the upper side of a flange junction part acts in the connection part of a flange structure.

For this reason, a metal plug attached to the end of the fluid pipe is inserted into the socket and connected, and the metal plug is used to support the heavy fluid pipe and reduce the burden on the connection. There has been proposed a fluid pipe connector structure in which a metal reinforcing portion for supporting the inserted state is provided in a socket portion to enable reliable connection. (For example, see Patent Document 1)
JP 2002-130574 A

However, in order to maintain a reliable connection between the metal plug and the socket portion, it is necessary to set a strict dimension that does not cause a gap between the outer diameter of the metal plug and the inner diameter of the metal reinforcing portion. For this reason, at the time of fitting between metal members, a metal galling state peculiar to fitting occurs, and it is difficult to smoothly perform the work of inserting and connecting the metal plug.
In addition, when metal members having strict dimensions are fitted to each other, since they are easily affected by expansion and contraction due to changes in environmental temperature, a smooth connection operation may be more difficult depending on temperature conditions.

From such a background, there is a demand for a fluid pipe connector structure that prevents galling that occurs when metal members are fitted to each other, and that can be easily connected even if there is expansion or contraction due to warmth.
The present invention has been made in view of the above circumstances, and the object of the present invention is to prevent galling that occurs when metal members are fitted to each other and to easily expand or contract dimensions due to warmth. An object of the present invention is to provide a fluid pipe connector structure that can be connected.

In order to solve the above problems, the present invention employs the following means.
In the present invention, a male-side metal plug attached to an end of a fluid pipe is inserted and connected to a female-side socket, and the insertion of the metal plug is supported on the inlet side of the socket. In the fluid pipe connector structure in which the ring-shaped metal reinforcing portion is fixedly provided, the metal reinforcing portion includes a metal plug housing, a metal front cover, and a substantially cylindrical resin liner. The resin liner includes a slit that is fixed to the inner peripheral surface of the plug housing and the front cover and is provided in a substantially cylindrical axial direction, and the metal plug is inserted into the socket portion. the outer peripheral surface of the metal plug and the inner circumferential surface of the resin liner so as to contact state, said between said plug housing and said front cover and said metal plug It is characterized in that the interposed fat liner.

According to the present invention, the metal reinforcing portion includes the metal plug housing, the metal front cover, and the substantially cylindrical resin liner, and the resin liner includes the plug housing and the front. It is fixed to the inner peripheral surface of the cover and has a substantially cylindrical axial slit, and the outer peripheral surface of the metal plug and the inner peripheral surface of the resin liner are inserted with the metal plug inserted into the socket. Since the resin liner is interposed between the metal plug, the plug housing, and the front cover so as to come into contact with each other, when the metal plug is inserted and fitted, contact between the metals is prevented. Moreover, since the slit provided in the resin liner makes the circumferential direction flexible, the fitting is facilitated even when the expansion and contraction occurs due to a temperature change or the like.

  According to the present invention described above, the adoption of the resin liner provided with the slit in the axial direction prevents the galling that occurs when the metal members are fitted to each other, and easily connects even if the dimension is expanded or contracted due to warmth. A fluid pipe connector structure can be provided.

Hereinafter, an embodiment of a fluid pipe connector structure according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the fluid pipe connector 1 is a member for connecting fluid pipes or between a fluid pipe and a storage tank, a processing apparatus, etc., and is mainly a metal that serves as a male-side coupling member. A plug 10 (hereinafter referred to as “plug”) 10 and a socket portion 30 serving as a female-side connecting member. Connection between the fluid pipes by the fluid pipe connector 1 is made by inserting the plug 10 into the recess 31 of the socket part 30.

The plug 10 is a member that is attached to the distal end portion of the fluid pipe 11 and fits into the socket part 30 to connect the fluid pipes or between the fluid pipe and a storage tank, a processing apparatus, or the like. As shown in FIG. 2, the plug 10 includes a tip plug portion 12, a valve 13, a tube support portion 14, a fixing nut 15, and a locking nut 16.
The fluid pipe 11 has a triple structure, and includes, for example, an inner tube made of fluororesin (PFA or the like), an intermediate tube made of synthetic resin, and an outer tube made of a stainless steel net.

The tip plug portion 12 is a member that is directly inserted into and connected to the socket portion 30 and is made of a metal such as stainless steel, for example. The tip plug portion 12 is formed in a substantially cylindrical shape, and a valve 13 is disposed at the tip opening.
The tube support portion 14 is a metal member that includes a fixed portion that fixes and supports the distal end portion of the fluid tube 11 and a cylindrical member that supports a fixed distance (for example, about 10 cm) from the distal end. The tube support portion 14 has one end portion of the fluid tube 11 sandwiched between a fixing portion located at a front end thereof and a rear end portion of the tip plug portion 12, and a fixing nut 15 screwed into the outer periphery in this state, and The end plug portion 12 is integrally connected by a locking nut 16. The fixing nut 15 and the locking nut 16 are made of the same metal as the tip plug portion 12.

  As described above, since the tubular member of the tube support portion 14 supports the fluid tube 11, the distal end portion of the fluid tube 11 connected to the plug 10 hardly bends, so that the clamping portion can be prevented from loosening. . Further, since the tubular member of the tube support portion 14 has an inner diameter slightly larger than the outer diameter of the fluid tube 11, the fluid tube 11 is caused by play formed between the outer periphery of the fluid tube 11 and the tubular member. It is supported gently and prevents sharp bends.

The socket portion 30 includes a metal reinforcing portion 40 on the inlet side of the concave portion 31 into which the plug portion 10 is inserted and connected. The metal reinforcing portion 40 is a ring-shaped member fixed to the housing 32 for the purpose of supporting the insertion / connection state of the plug portion 10 and the fluid pipe 11 having a large weight. A front cover 42 made of resin and a resin liner 43 are provided.
The plug housing 41 is fixed to a flange portion 33 provided at the tip of the housing 32 using a plurality of bolts 34.
The front cover 42 is fixed to the front end surface of the plug housing 41 using a plurality of bolts 35.

The resin liner 43 is a resin member such as polyethylene (PE) fixedly attached to the inner peripheral surfaces of the plug housing 41 and the front cover 42.
As shown in FIGS. 3 and 4, the resin liner 43 is a substantially cylindrical resin member provided with one or more slits 43a in the axial direction (plug insertion direction). When the plug 10 is inserted, The metal outer peripheral surface on the plug side contacts the inner peripheral surface of the resin liner 43 fixed to the socket portion 30 side.
More specifically, in the connection state with the socket portion 30 in which the insertion of the plug 10 is completed, the outer peripheral surfaces of the fixing nut 15 and the locking nut 16 that have the largest outer diameter in the insertion portion of the plug 10 are resin liners. 43 is in close contact with the inner peripheral surface of 43.

In order to maintain a reliable connection between the plug 10 and the socket portion 30, a gap that causes rattling is generated between the outer diameter of the plug 10 and the inner diameter of the metal reinforcing portion 40. This is because there is no strict dimension setting required. Accordingly, the outer diameters of the fixing nut 15 and the locking nut 16 on the plug 10 side and the inner diameter of the resin liner 43 on the socket part 30 side are substantially the same dimensions. In other words, the outer diameters of the fixing nut 15 and the locking nut 16 are set to be approximately the same as the inner diameter of the resin liner 43 attached to the metal reinforcing portion 40 of the socket portion 30.
Reference numeral 36 in the drawing is an external pipe connected to the socket part 30, which is a fluid pipe connected to the housing 32 of the socket part 30.

  In the fluid pipe connector 1 having the above-described configuration, when the plug 10 is inserted into the socket portion 30, the resin liner 43 is interposed, so that a metal unique to fitting between metal members, which is a problem of the conventional structure, is present. It is possible to prevent galling. That is, when the plug 10 is inserted, the metal plug 10 comes into contact with a soft resin member as compared with the metal, and the slit portion 43a that makes the circumferential direction flexible enables a slight diameter expansion. Even when the dimensions are set, there is no galling that occurs when fitting between metals, and the work of smoothly inserting and connecting the metal plug 10 into the socket 30 can be easily performed. It becomes.

Further, when metal members having strict dimensions are fitted to each other, smooth connection work becomes even more difficult because they are easily affected by expansion and contraction due to changes in environmental temperature. However, like the fluid pipe connector 1 having the above-described configuration, the inner diameter dimension on the socket side is shrunk particularly by the temperature drop by interposing the flexible resin liner 43 in the circumferential direction with the slit 43a. Since the resin liner 43 can flexibly expand the environmental temperature change, the connection work can be easily performed.
As described above, the fluid pipe connector 1 according to the present invention prevents galling that occurs when the metal members are fitted to each other, and can be easily connected even if there is a size expansion or contraction due to a feeling of warmth.
In addition, this invention is not limited to embodiment mentioned above, In the range which does not deviate from the summary of this invention, it can change suitably.

It is a partial section perspective view showing a connection state as one embodiment of a fluid pipe connector structure concerning the present invention. It is a front view which shows the state before a connection about the fluid pipe connector structure of FIG. It is a top view which shows the resin-made liner employ | adopted by this invention. It is AA sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluid pipe connector structure 10 Metal plug 11 Fluid pipe 12 Tip plug part 15 Fixing nut 16 Locking nut 30 Socket part 31 Recess 32 Housing 36 External piping (fluid pipe)
40 Metal reinforcement 41 Plug housing 42 Front cover 43 Resin liner 43a Slit

Claims (1)

A male-side metal plug attached to the end of the fluid pipe is inserted into the female-side socket part and connected, and the ring is fixed to the inlet side of the socket part to support the inserted state of the metal plug. In the fluid pipe connector structure provided with a metal reinforcing part in the shape ,
The metal reinforcing portion includes a metal plug housing, a metal front cover, and a substantially cylindrical resin liner,
The resin liner includes a slit provided in the axial direction of a substantially cylindrical shape while being fixed to the inner peripheral surface of the plug housing and the front cover.
The metal plug, the plug housing, and the front cover are arranged so that the outer peripheral surface of the metal plug and the inner peripheral surface of the resin liner are in contact with each other with the metal plug inserted into the socket portion. A fluid pipe connector structure in which the resin liner is interposed therebetween.

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